Firearm upper assembly



FIG. 1 is a front perspective view of a firearm upper assembly showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a right-side view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a front view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken line in the drawings depicts unclaimed subject matter that and forms no part of the claimed design. 

CLAIM I claim the ornamental design for a firearm upper assembly, as shown and described. 